[j rick kirby]

A number of tuners have told me there's not much power to be had from tuning a basically stock engine so that tells you that the factory tune is pretty good. Now you can always lean it out some more and maybe bump the timing a little but that's how you screw up a motor and get very little for it. A little on the rich side is safe. I track my car so that means that I am turning it hard for extended periods of time so I use a plug one step colder to lower plug temps and give me a little safety margin against pre-ignition.